Implement mounting



E. C. TREFRY IMPLEMENT MOUNTING Filed Feb. 18, 1946- Nov. 2, 1948. 2,452,701

w 7 \IIIIIIIIIIIIIII 6) [7 9 A 22 L? INVENTOR. E'Qqar O. Trefry ATTwZ VEY Patented Nov. 2, 1948 IMPLEMENT MOUNTING Edgar C. Trefry, Los Angeles County, Calif., as-

signor of one-half to G. Loren Le Munyon, Los Angeles County, Calif.

Application February 18, 1946, Serial No. 648,281

Claims.

My invention relates generally to mountings for implements and more particularly relates to mountings for bench implements of the type in which a variety of tools may be set up to be driven from a motor upon a work-bench. As herein used, the term implement is inclusive of both the motor and the tool driven thereby as a driveconnected unit, although in respects other than the belt supplying the connecting drive, and the mutual support of the work bench, they may be divided.

In bench operations it is desirable to be able to drive selectively a variety of tools from a single motor in order to save unnecessary investment in a plurality of motors and the bench or shop space required therefor. Bench tools such as grindstones, buffing wheels, drill holders, and the like, are of various sizes, are driven at different speeds, and because of different pulley sizes require different placements in relation to the motor or changes of belt length. If the motor is suspended overhead, the placement of the tool must ordinarily be changed, whereas it is a convenience to have a fixed placement for the tool adjacent a vise or other work holder. It is also frequently desirable to be able to quickly substitute a motor of different speed or power adjacent to work already set up. In my invention these difficulties are obviated, and advantages gained, by provision of an improved mounting for the driving motor in connection with the provision separate bench mountings for the motor and the tool, each of which has a part or parts held in fixed position on the bench, and parts removably engageable with the fixed parts, parts of the motor mounting being movable to move the motor to selected positions in relation to the .tool and being held in such positions by a single clamp.

It is a principal object of my invention to provide a bench mounting for a motor which is quickly and readily adjustable for the alinement of driving and driven pulleys and the center spacing thereof to accommodate tools in which such requirements differ.

Another object of my invention is to provide an implement mounting having fixed and removable parts permitting the quick substitution of motors as required for the proper operation of different tools.

Still another object of my invention is the provision of an implement mounting having parts fixed to a bench and cooperating parts fastenable to motors and tools permitting the quick settingup of motors and tools so equipped at any station provided with such fixed parts.

A further object of my invention is to provide an implement mounting wherein the distance between pulley centers of a motor equipped with a step-cone pulley and a tool not so equipped may be quickly adjusted to allow changes in the driven speed of the tool, and wherein the motor is floatingly self-alining to the changing alinements of a single step-cone drive.

Further objects and advantages of my invention will hereinafter be mentioned or will be apparent in the following description and from the accompanying drawings, in which:

Fig. 1 is a plan view of my implement mounting, with a motor and tool mounted thereon shown in phantom;

Fig. 2 is an end elevation as viewed from line 22 of Fig. 1; and

Fig. 3 is a fragmentary section on the line 3-3 of Fig. 1.

As hereinbefore stated, my invention contemplates that a motor, designated A, and a tool B are to be mounted on a bench C and operably connected by a belt D. As my invention has advantages in relation to a step-cone drive, the motor pulley E is shown as of the step-cone grooved type and the belt D is accordingly of V type, although a flat belt and fiat step-cone pulley may be used, and also a flat single pulley. The tool B is illustrated for example as provided with a single grooved pulley F, which of course may be positioned in other relation to the tool than that shown.

The motor A is firmly fastened to a motor plate 5 in any convenient manner, it being not necessary with my implement mounting that the motor should be movable upon the plate. In fact the motor A and plate 5 are, as hereinafter described, movable together to any desired location. A slide bar ii is fastened to the bench C by brackets and screws 8, and a bench strip 9 is fastened to the bench parallel to the slide bar and at a suitable distance therefrom. Rails H and I2 have channels it in their inner opposed faces adapted to receive slidably the lateral margins of the plate 5, and are supported on the slide bar 6 by bushings l4 and a spacing tube E5. The bushings [4 are slidable and rotatable up the slide bar 6 and may have a pressed fit in the ends of the spacing tube I5. Spacing tube I5 has ends l6 proportioned to fit slidably within holes I? in the rails H and i2 below the channels it and adjacent one end of said rails, and may be so formed as to present outwardly faced shoulders i9 so spaced as to permit some end play of the spacing tube between the rails when a motor plate 5 is held by the channels [3. The holes I! are proportioned to clear the bushings M by a considerable margin outwardly from the spacing tube l5, and to clear the slide bar 6 by a greater margin outwardly from the bushings I4. The ends of the rails H and 12 adjacent the slide bar 6 extend therebeyond and are pierced below the channels 53 by holes 21 through which extends a tie-rod 22, threaded at its ends and fitted with nuts 23 by which the spacing of the rails may be adjusted. Adjacent their opopsite ends, the rails H and I? are pierced below the channels 43 by holes 2% through which extends a locking stud 25, threaded at its ends and fastened to one of the rails by nuts 26 and having a clamp or wing nut 2'5 on the end protruding beyond the other rail, preferably the rail at the right hand of an operator facing the bench C. The ends of the rails adjacent the locking stud 25 normally rest slidably n the bench strip 9 which serves as a fricticinreducing track therefor along the bench is preferably of such height relative to the height of the slide bar that the rails incline downwardly thereto and rest upon it with a narrow area of contact. I Each'of the tools which it is intended shall be used with my implement mounting is firmly fastened to a tool plate M, as by welding or bolting thereto. Tool plate 3! may have a flanged end 32 provided with a notch 33 and a second notch 34 atits other end. A bench plate 35, conforming to tool plate 3i and having holes 36 and 3': to register with notches 33 and 34, is fastened to the 'bench C, as by screws 38, with its flanged end 39 bearing against the bench edge. Studs ii and 42, threaded at both ends, may be sunk in the bench C through the holes 36 and 3?, and locking nuts 33 and M are fitted to the outwardly extending ends of said studs. A tool plate 3|, with a tool B fastened thereto may be placed upon the bench plate 35 with the notches 33 and 34 engaging the studs ll and 12, and may be clamped in that position by the locking nuts 13 and M.

To install and adjust a motor to meet the driving requirement of a tool mounted as above described, the nuts 23 on the tie-rod 22 are adjusted to space the rails ll and i2 so that the lateral margins of a motor plate 5, with a motor A mounted thereon, may be s-lidably moved Within the channels I55. When the plate 5 has been so placed within the channels it, tightening of the clamp El Will cause the near end of the plate to be gripped firmly between the rails. As the rod '22 and locking stud 25 are both below the channels l3, a very considerable torsional leverage is imposed upon the rails ii and i2, tending to twist their lower margins inwardly toward each other, which may be employed to cause the margins of the plate 5 to be gripped not only by the inner walls of the channels but also by the lateral walls thereof. If the rails were mounted directly on the bushings i l, and thereby on the slide bar 6, this torsional leverage might cause the bushings to bind upon, and even to indent or burr, the slide bar. The reason for mounting the rails upon the ends E6 of the spacing tube [5 will now be apparent, as the annular margins thus provided between the rails and the bushings and between the rails and the slide bar prevent binding contacts being made when the rails are twisted. The shoulders l9 cooperate with the tie-rod 22 to hold the rails 4 approximately parallel, to more readily receive a motor plate 5, and to prevent a crushing action upon the spacing tube [5 such as might be applied if the clamp 2! were tightened when no motor plate was present.

If the motor A is to be adjusted to obtain a belt-tensioning distance between pulleys E and F, as is usually the case, the clamp 21 is allowed to remain loose until after the pulleys are alined. Alinement may be made by sliding the motor A, plate 5, and rails H and i2 with the connecting tie rod 22, spacing tube l5 and bushing l6, and locking stud 25 along the slide bar 6 and bench strip 9. As the weight of the parts so moved is supported only on the bushings l4 and the near ends of the rails which are in contact with the bench strip 9, there is a minimum of frictional contact between the movable and the fixed parts, and an approximate manual a-linement will suffice, as tension on the belt D will overcome this minimum friction and bring and maintain the pulley E in adequate alinement with the pulley F. When the approximate alinement has been obtained manually, the belt D is placed upon the pulleys, and the position of plate 5 is adjusted in the channels it to give the desired belt tension. The clamp 27 is then tightened.

The above procedure is followed when a change of motors is to be made or when a change of tools requires a change of placement of the motor. To effect a change of tools, the clamp 21 is loosened to permit forward movement of the motor plate E5 and loosening of the belt D. The locking nuts 13 and i l are then loosened, and the tool B and tool plate 31 may be lifted from the bench plate 35 by disengaging the notches 33 and from the studs 4| and 42.

To change the speed of a tool already mounted, the clamp 21 is loosened to relieve tension on the belt D, the belt is moved to the desired groove on the step-cone pulley E, and the motor plate 5 is moved to secure proper belt tension and again clamped by the clamp 2?. The low friction of the support points for the laterally movable parts will permit those parts to float into a position of proper pulley alinement.

Having now described and illustrated a preferred embodiment of my invention, I Wish it understood that I do not wish to be limited to the exact arrangement of parts herein shown but that my invention includes such modifications and changes as fall within the scope and spirit of the appended claims.

claim:

1. A motor mounting means for a driving motor adapted for use in a drive-connected unit including a driven tool which is subject to change with a resultingalteration in the position of the driveconncction, said motor and tool being mounted on a common supporting member, which comprises: a motor plate adapted to be aflixed to said motor; rails extending longitudinally toward the position of said tool and having longitudinal channels wherein the lateral margins of said motor plate are slidably engageable; means for holding said rails in substantially parallel spaced relation; means for clamping said rails to said plate; and means connecting said motor plate and said rails to said common supporting member, inclusive of a slide bar extending at right angles to said rails and friction reducing means between said rails and said slide bar whereon said plate and rails are slidable at right angles to said rails.

2. A motor mounting means for a driving motor adapted for use in a drive-connected unit including a driven tool which is subject to change with a resulting alteration in the position of the driveconnection, said motor and tool being mounted on a common supporting member, which comprises: a motor plate adapted to be afiixed to said motor; rails extending longitudinally toward the position of said tool and having longitudinal channels wherein the lateral margins of said motor plate are slidably engageable; means below said channels for holding said rails in substantially parallel spaced relation; means below said channels for clamping said rails to said plate; and means connecting said motor plate and said rails to said common supporting member, inclusive of a slide bar extending at right angles to said rails and friction reducing means between said rails and said slide bar whereon said plate and rails are slidable at right angles to said rails.

3. A motor mounting means for a driving motor adapted for use in a drive-connected unit including a driven tool which is subject to change with a resulting alteration in the position of the drive-connection, said motor and tool being mounted on a common supporting member, which comprises: a motor plate adapted to be aifixed to said motor; rails extending longitudinally toward the position of said tool and having longitudinal channels wherein the lateral margins of said motor plate are slidabiy engageable; means below said channels for holding said rails in substantially parallel spaced relation; means below said channels for clamping said rails to said plate; and means connecting said motor plate and said rails to said common supporting member, inclusive of a slide bar and friction reducing means between said rails and said slide bar whereon said plate and rails are slidable at right angles to said drive connection.

4. A motor mounting means for a driving motor adapted for use in a drive-connected unit including a driven tool which is subject to change with a resulting alteration in the position of the driveconnection, said motor and tool being mounted on a common supporting member, which comprises: a motor plate adapted to be afiixed to said motor; rails extending longitudinally toward the position of said tool and having longitudinal channels wherein the lateral margins of said motor plate are slidably engageable; a tie rod engageable with one end of each of said rails for holding said rails in spaced relation; means adjacent the other ends of said rails for clamping said rails to said plate whereby said motor may be selectively positioned toward or away from said tool; a slide bar aiiixed to said common supporting member at right angles to said drive connection; bushings slidably on said slide bar; and a spacing tube mounted on said bushings and slidably supporting said rails so as to hold such rails spaced from said slide bar.

4, 5. A motor mounting means for a driving motor adapted for use in a drive-connected unit including a driven tool which is subject to change with a resulting alteration in the position of the driveconnection, said motor and tool being mounted on a common supporting member, which comprises: a motor plate adapted to be affixed to said motor; rails extending longitudinally toward the position of said tool and having longitudinal channels wherein the lateral margins of said motor plate are slidably engageable; a tie rod engageable with one of each of said rails below said channels for holding said rails in relation; means adjacent the other ends of said rails and below said channels for clamping said. rails to said plate whereby said motor may be selectively positioned toward or away from said tool; a slide bar amxed to said common supporting member at right angles to said rails; bushings slidably on said slide bar; a spacing tube mounted on said bushings and slidably supporting said rails at points below said channels so as to hold said rails spaced from said slide bar; and a friction reducting track for said other ends of said rails.

EDGAR C. TREFRY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,344,168 Brown June 22, 1920 1,942,834 Railley Jan. 9, 1934 1,982,254 Juengling Nov. 27, 1934 2,176,572 I-Iedgpeth Oct. 17, 1939 2,307,382 Boller Jan. 5, 1943 2,364,855 Kampstad et al. Dec. 12, 1944 2,370,048 Koch Feb. 20, 1945 

